Low tire pressure detector
First Claim
1. A tire pressure monitoring system for a vehicle having a plurality of tires and having an operator'"'"'s cab comprising:
- a. a plurality of tire pressure sensing means for sensing pneumatic pressure within said tires;
each of said tire pressure sensing means being in communication with its respective tire and operable to sense the pneumatic pressure therewithin;
said tire pressure sensing means being perpendicular to the plane of said tire such that it is insensitive to false alarms such as bounce or centrifugal force by said tire;
b. a plurality of transmitters connected, respectively and responsively with a plurality of said tire pressure sensing means, and adapted to be energized when any one of said tire pressure sensing means indicates a low pneumatic pressure within one of the tires;
c. at least one receiver responsively disposed near enough to said transmitters to be responsive to said transmitters so as to be energized by said transmitters when one of said transmitters is energized by its one tire pressure sensing means; and
d. a warning means disposed in the operator'"'"'s cab for conveying a warning to an operator when a low pressure is sensed within one of said tires;
said warning means being electrically connected with said receiver so as to be energized when said receiver is energized.
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Accused Products
Abstract
A tire pressure monitoring system for vehicles characterized by a plurality of tire pressure sensors for sensing pneumatic pressure interiorly of the tire, a plurality of transmitters connected responsively with the tire pressure sensors and adapted to be energized when any one of the tire pressure sensors indicates a low pneumatic pressure within one of the tires; at least one receiver responsively disposed with respect to the transmitters so as to be energized by a transmitter when the transmitter is energized by the tire pressure sensor and a warning means, including a buzzer and a light, disposed in the operator'"'"'s cab for conveying the warning to the operator when a low tire pressure is sensed, the warning means being electrically connected with the receiver, or receivers, so as to be energized when the receivers are energize. Also the transmitters are disposed at the central hub so as not to unbalance the wheel and sense each tire on a wheel, even when its a dual wheel at each location; and wherein a pair of receivers are disposed one at the back of a towing portion of an eighteen wheel truck and one at the back of a towed portion of an eighteen wheel truck so as to be responsive to the transmitters at each of the dual wheel monitors.
103 Citations
20 Claims
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1. A tire pressure monitoring system for a vehicle having a plurality of tires and having an operator'"'"'s cab comprising:
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a. a plurality of tire pressure sensing means for sensing pneumatic pressure within said tires;
each of said tire pressure sensing means being in communication with its respective tire and operable to sense the pneumatic pressure therewithin;
said tire pressure sensing means being perpendicular to the plane of said tire such that it is insensitive to false alarms such as bounce or centrifugal force by said tire;b. a plurality of transmitters connected, respectively and responsively with a plurality of said tire pressure sensing means, and adapted to be energized when any one of said tire pressure sensing means indicates a low pneumatic pressure within one of the tires; c. at least one receiver responsively disposed near enough to said transmitters to be responsive to said transmitters so as to be energized by said transmitters when one of said transmitters is energized by its one tire pressure sensing means; and d. a warning means disposed in the operator'"'"'s cab for conveying a warning to an operator when a low pressure is sensed within one of said tires;
said warning means being electrically connected with said receiver so as to be energized when said receiver is energized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for detecting low pressure in a vehicle tire, said tire lying in a plane, comprising:
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(a) a piston slidingly disposed in an assembly, said piston having two sides, one of said piston sides being adapted to be in communication with air located inside of said tire, the other of said piston sides being in contact with spring means, wherein said spring means pushes said piston when a predetermined low pressure is applied to said one side of said piston; (b) switch means disposed in said assembly and located adjacent to said piston so as to be actuated when said spring means pushes said piston due to low air pressure; (c) a transmitter being electrically connected to said switch means, said transmitter being located in said assembly and being powered by a battery in said assembly, wherein said switch means energizes said transmitter when said spring means pushes said piston due to low air pressure; (d) said assembly being adapted to be coupled to said tire such that said piston moves in a direction that is perpendicular to the plane of said tire, said assembly being centrally disposed to said tire, wherein the orientation of said piston reduces false low pressure alarms.
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10. An apparatus for detecting low pressure in vehicle tires, each of said tires lying in a plane, comprising:
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(a) a plurality of sensing assemblies, each of said assemblies having a piston slidingly disposed therein, said piston having two sides, one of said piston sides being adapted to be in communication with air located within the respective tire, the other of said piston sides being in contact with respective spring means, wherein said respective spring means pushes said respective piston when a predetermined low pressure is applied to said one side of said piston; (b) each of said assemblies have a switch means disposed therein, said respective switch means being located adjacent to said respective piston so as to be actuated when said spring means pushes said piston due to low air pressure; (c) each of said assemblies having a transmitter that is electrically connected to said switch means, said transmitter being powered by a battery in said assembly, wherein said switch means energizes said transmitter when said spring means pushes to said piston due to low air pressure; (d) each of said assemblies being coupled to a tire such that said respective piston moves in a direction that is perpendicular to the plane in said respective tire, each of said assemblies being centrally disposed on said respective tires; (e) a receiver located on said vehicle so as to be near said transmitters so that said receiver can receive a signal produced by said transmitters; (f) warning means for warning of a low tire condition, said warning means being located in a cab of said vehicle and being electrically connected with said receiver, said warning means having indicating means that is operated when said receiver receives a signal from one of said transmitters. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification